Source : Webster's Revised Unabridged Dictionary (1913)

Doffer \Doff"er\, n.
   1. (Mach.) A revolving cylinder, or a vibrating bar, with
      teeth, in a carding machine, which doffs, or strips off,
      the fiber from the cards.

   2. (Spinning) A worker who replaces full bobbins by empty
      ones on the throstle or ring frames.

Doffer \Doff"er\, n. (Mach.)
   A revolving cylinder, or a vibrating bar with teeth, in a
   carding machine, which doffs, or strips off, the cotton from
   the cards. --Ure.